Foot rest



FIG. 1 is a perspective view of a foot rest;

FIG. 2 is a plan view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 an end elevation view thereof.

The broken lines in the drawings represent environmental subject matter that forms no part of the claimed design. 

The ornamental design for a foot rest, as shown and described. 